Sreenivash, Don't mix up to levels of authorization. APPLSYSPUB/PUB - is DB username which is used by any utility to retrieve APPS schema password for further logins. GUEST/ORACLE - is EBS username with no or max limited privileges to execute some authorization function. I think both used during regular an End used authorization process. First of all connection to DB using APPLSYSPUB/PUB then to EBS using GUEST/ORACLE. End of the day APPS user is used to establish final connection. May be APPS connections came in to the action in between listed above. Just my 0.02$ Jurijs On 8/2/07, k srinivas <k.sridba@xxxxxxxxx> wrote: > Hi DBAs, > > Can anybody plz point the exact difference between GUEST/ORACLE and > APPLSYSPUB/PUB.. > and where does APPLSYSPUB/PUB comes into picture... > > I guess when User types his Username Password in login window and clicks > submit button..Then > Webserver checks that username and passwords need to authenticate against > database FND_USER > table..So GUEST/USER comes into picture...but Where does APPLSYSPUB/PUB > comes into > picture... > > Plz advice me......... > > Sreenivash. -- Yury +371 29268222 (+2 GMT) ============================================ http://otn.oracle.com/ocm/jvelikanovs.html